Patent GB-178148-A (GB)
Title: Improvements relating to caps and the like used for closing preserving bottles, jars,containers, mineral water bottles and the like
IPC: B65D41/04
Filed: 1920-11-01
Abstract: 178,148. Brown, R. S. Nov. 1, 1920. Capsule closures and retaining-bands for special closures; stoppers, making; stoppers, spring and like.-Relates to closures for bottles, tins, jars, &c., of the type in which (1) the rim of the closure is sufficiently large to admit of the top of the receptacle occupying its closing position without swaging out the material of the rim, (2) a part of the rim is inwardly deformed, after application, into shouldering locking engagement with the receptacle or an attachment thereon, (3) the lock so formed has substantial lateral supporting connection below the level of the engagement, (4) the non-locking portion of the rim is. adapted at the time of the lock to follow the normal peripheral external outline of the receptacle, and (5) the locks are so disposed as to admit of the removal of the closure without destruction of the non-locking portion of the rim. According to the invention, a closure of this type is constructed with widely separated locks so that the rim between and at the line of the locks follows the normal peripheral outline of the receptacle. In applying a closure of this type, the receptacle is centered with relation to a tool-holding head and plungers are operated to force the rim into shouldering locking engagement with the receptacle. The plungers may be blunt or excising, and auxiliary formations may also be formed at this stage. In the form of closure shown in Figs. 1 and 2,. the lid b is formed with a depending rim c provided with locks k engaging a portion f of the receptacle a. The lid is strengthened by ribs d, j<1>, and carries packing h. Three locks are formed,. and are adapted to be forced out of locking engagement by rotating them against excrescences l on the receptacle. In another form, the top portion of the cover is formed with a screw-thread engaging a corresponding formation on the receptacle, the locks being formed beneath. In another form, the locks are formed so as to engage beneath interrupted projections n, Fig 11, on the receptacle. The locks may be formed by bending the material inwards adjacent to cuts in the rim; in the form shown in Fig. 13, the metal may be bent in below either of the cuts k, k<1> or between them. The cuts k, k<1> may be curved. Sealing- media may be applied in various positions as shown in Figs. 19, 21 and 23. The cover may be applied in more than one " on " position, and may be independent of the relative circular positions of the lid and receptacle. Additional formations may be provided on the receptacle, as shown at g, Fig. 8, so that the locks may engage at more than one level. The lid may be hinged or provided with attachments to prevent loss. Auxiliary engagements such as beadings, recesses, indentations, &c. on the lid or receptacle may be provided to provide additional security, retain sealing media, prevent lateral rim play, &c. The closure may be adapted, by local weakening or other means, to enable it to act as a safety valve when in the full " on " position. The locks may be partially formed before the lid is applied to the receptacle. The closure may be used over internal screw stoppers.